Finding the Fourth Proportional to 142,111.64, 213,042.02 and 57,942.20

Step by Step Solution

1. Step 1: Write the proportion equation
   142,111.64 : 213,042.02 = 57,942.20 : x
2. Step 2: Convert to fraction form
   142,111.64/213,042.02 = 57,942.20/x
3. Step 3: Cross multiply
   142,111.64x = 213,042.02 × 57,942.20
4. Step 4: Simplify right side
   142,111.64x = 12,344,121,976.32
5. Step 5: Solve for x
   x = 12,344,121,976.32/142,111.64
6. Step 6: Final answer
   x = 86,862.15